The transcallosal transchoroidal approach to the diencephalic-mesencephalic junction: how I do it

Abstract

Background: Different approaches have to be considered for lesions of the diencephalic-mesencephalic junction based on the localization, extension of the lesion, and relationship to the ventricular system.

Method: We present the case of a young lady who presented with a cavernoma of the junction of midbrain and diencephalon after an episode of hemorrhage. The microsurgical anatomy of the trans-callosal trans-choroidal approach for this lesion is described along with its advantages and limitations.

Conclusion: The trans-choroidal approach allows adequate access to lesions of the diencephalic-mesencephalic junction that project into the third ventricle.

Keywords: Cavernous malformation; Choroid fissure; Diencephalic-mesencephalic junction; Mesencephalon; Transchoroidal approach.